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//===- llvm/unittest/Support/FileOutputBuffer.cpp - unit tests ------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/FileOutputBuffer.h"
#include "llvm/Support/Errc.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/raw_ostream.h"
#include "gtest/gtest.h"
using namespace llvm;
using namespace llvm::sys;
#define ASSERT_NO_ERROR(x) \
if (std::error_code ASSERT_NO_ERROR_ec = x) { \
SmallString<128> MessageStorage; \
raw_svector_ostream Message(MessageStorage); \
Message << #x ": did not return errc::success.\n" \
<< "error number: " << ASSERT_NO_ERROR_ec.value() << "\n" \
<< "error message: " << ASSERT_NO_ERROR_ec.message() << "\n"; \
GTEST_FATAL_FAILURE_(MessageStorage.c_str()); \
} else { \
}
namespace {
TEST(FileOutputBuffer, Test) {
// Create unique temporary directory for these tests
SmallString<128> TestDirectory;
{
ASSERT_NO_ERROR(
fs::createUniqueDirectory("FileOutputBuffer-test", TestDirectory));
}
// TEST 1: Verify commit case.
SmallString<128> File1(TestDirectory);
File1.append("/file1");
{
Expected<std::unique_ptr<FileOutputBuffer>> BufferOrErr =
FileOutputBuffer::create(File1, 8192);
ASSERT_NO_ERROR(errorToErrorCode(BufferOrErr.takeError()));
std::unique_ptr<FileOutputBuffer> &Buffer = *BufferOrErr;
// Start buffer with special header.
memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
// Write to end of buffer to verify it is writable.
memcpy(Buffer->getBufferEnd() - 20, "AABBCCDDEEFFGGHHIIJJ", 20);
// Commit buffer.
ASSERT_NO_ERROR(errorToErrorCode(Buffer->commit()));
}
// Verify file is correct size.
uint64_t File1Size;
ASSERT_NO_ERROR(fs::file_size(Twine(File1), File1Size));
ASSERT_EQ(File1Size, 8192ULL);
ASSERT_NO_ERROR(fs::remove(File1.str()));
// TEST 2: Verify abort case.
SmallString<128> File2(TestDirectory);
File2.append("/file2");
{
Expected<std::unique_ptr<FileOutputBuffer>> Buffer2OrErr =
FileOutputBuffer::create(File2, 8192);
ASSERT_NO_ERROR(errorToErrorCode(Buffer2OrErr.takeError()));
std::unique_ptr<FileOutputBuffer> &Buffer2 = *Buffer2OrErr;
// Fill buffer with special header.
memcpy(Buffer2->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
// Do *not* commit buffer.
}
// Verify file does not exist (because buffer not committed).
ASSERT_EQ(fs::access(Twine(File2), fs::AccessMode::Exist),
errc::no_such_file_or_directory);
ASSERT_NO_ERROR(fs::remove(File2.str()));
// TEST 3: Verify sizing down case.
SmallString<128> File3(TestDirectory);
File3.append("/file3");
{
Expected<std::unique_ptr<FileOutputBuffer>> BufferOrErr =
FileOutputBuffer::create(File3, 8192000);
ASSERT_NO_ERROR(errorToErrorCode(BufferOrErr.takeError()));
std::unique_ptr<FileOutputBuffer> &Buffer = *BufferOrErr;
// Start buffer with special header.
memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
// Write to end of buffer to verify it is writable.
memcpy(Buffer->getBufferEnd() - 20, "AABBCCDDEEFFGGHHIIJJ", 20);
ASSERT_NO_ERROR(errorToErrorCode(Buffer->commit()));
}
// Verify file is correct size.
uint64_t File3Size;
ASSERT_NO_ERROR(fs::file_size(Twine(File3), File3Size));
ASSERT_EQ(File3Size, 8192000ULL);
ASSERT_NO_ERROR(fs::remove(File3.str()));
// TEST 4: Verify file can be made executable.
SmallString<128> File4(TestDirectory);
File4.append("/file4");
{
Expected<std::unique_ptr<FileOutputBuffer>> BufferOrErr =
FileOutputBuffer::create(File4, 8192, FileOutputBuffer::F_executable);
ASSERT_NO_ERROR(errorToErrorCode(BufferOrErr.takeError()));
std::unique_ptr<FileOutputBuffer> &Buffer = *BufferOrErr;
// Start buffer with special header.
memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
// Commit buffer.
ASSERT_NO_ERROR(errorToErrorCode(Buffer->commit()));
}
// Verify file exists and is executable.
fs::file_status Status;
ASSERT_NO_ERROR(fs::status(Twine(File4), Status));
bool IsExecutable = (Status.permissions() & fs::owner_exe);
EXPECT_TRUE(IsExecutable);
ASSERT_NO_ERROR(fs::remove(File4.str()));
// TEST 5: In-memory buffer works as expected.
SmallString<128> File5(TestDirectory);
File5.append("/file5");
{
Expected<std::unique_ptr<FileOutputBuffer>> BufferOrErr =
FileOutputBuffer::create(File5, 8000, FileOutputBuffer::F_no_mmap);
ASSERT_NO_ERROR(errorToErrorCode(BufferOrErr.takeError()));
std::unique_ptr<FileOutputBuffer> &Buffer = *BufferOrErr;
// Start buffer with special header.
memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
ASSERT_NO_ERROR(errorToErrorCode(Buffer->commit()));
// Write to end of buffer to verify it is writable.
memcpy(Buffer->getBufferEnd() - 20, "AABBCCDDEEFFGGHHIIJJ", 20);
// Commit buffer.
ASSERT_NO_ERROR(errorToErrorCode(Buffer->commit()));
}
// Verify file is correct size.
uint64_t File5Size;
ASSERT_NO_ERROR(fs::file_size(Twine(File5), File5Size));
ASSERT_EQ(File5Size, 8000ULL);
ASSERT_NO_ERROR(fs::remove(File5.str()));
// TEST 6: Create an empty file.
SmallString<128> File6(TestDirectory);
File6.append("/file6");
{
Expected<std::unique_ptr<FileOutputBuffer>> BufferOrErr =
FileOutputBuffer::create(File6, 0);
ASSERT_NO_ERROR(errorToErrorCode(BufferOrErr.takeError()));
ASSERT_NO_ERROR(errorToErrorCode((*BufferOrErr)->commit()));
}
uint64_t File6Size;
ASSERT_NO_ERROR(fs::file_size(Twine(File6), File6Size));
ASSERT_EQ(File6Size, 0ULL);
ASSERT_NO_ERROR(fs::remove(File6.str()));
// Clean up.
ASSERT_NO_ERROR(fs::remove(TestDirectory.str()));
}
} // anonymous namespace
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